Coal and ore mining machine



l 2 sheetssheet 1. S. STUTZ.

GOAL AND ORE MINING MACHINE.

(NQ Model.)

No. 302,959. Patented Aug. 5, 1884.

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(No Model.) Y2 Sheets-Sheet 2.

S. STU'IZ. com. AMORE MINING MAQHINE.

d Aug, 5, 1834;

Pkt J N. M3515, Pmlauihngmphgr, wauwau u c UNITED S'rnf'res Ferarri triceo SEBASTIAN STUTZ, OF PITTSBURG, PENNSYLVANIA.

COAL AND ORE MINING IWACHINE.-

SPECIFICATION forming part of Letters Patent No. 302,959, dated August 5x 1884.

Application filed September 10, 1883.

To all whomz't may concern.-

Be it known that I, SEBAsTLlN Srnrz, a citizen of the United States, residing at Pittsburg, county of Jllegheny, State ,of Pennsylvania, have invented or discovered a new and useful Improvement in Goal and Ore Mining Machines; and I do hereby declare the followingto be a full, clear, concise, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in which-like letters indicating like parts- Figure 1 is a vertical longitudinal central section through a mining-machine embodying my invention; Fig. 2, a plan or top view of the same; Fig. 3, a side View, in elevation, of the pick and holder; Fig. et, a transverse section through thepick-holder at the line 3 3 of Fig. 2; Fig. 5, a similar section through the piston-rod; Fig. 6, asimilar section through the guide at the line 2 2 of Fig. 2 5 Fig. 7, a vertical longitudinal central section, on an enlarged scale, through the cylinder, valve-chest, and portion of the guide 5 Fig. S, a plan or top view ofthe same,with the valve-chest removed; Fig. 9, a transverse section at the line 4 4 of Fig. 7, and Figari() an end View as seen from the rear.

My invention relates to a machine for undcrcutting or undermining, slotting, and excavating as required in mining coal, ore, die., preparatory to wedging or blasting out and displacing the mass of material; and it con- .sists in certain novel devices and combina-` tions, hereinafter set forth, for operating the valve, locating, securing, and guiding the pick, pick-holder, and piston-rod, and adjusting and directing the position and movements of the apparatus.

To carry out my invention I provide a cylinder, C, which is mounted and supported upon two pairsof wheels, "W W and W W', each iitted to rotate upon journals formed 'on the-ends of bars fw w, which are bolted to the under side of the cylinder, the front pair of wheels, YV 7, being. made concentric with, and the rear pair, TWV, eccentric to, their journals, for a purpose presently to be described. A valve-chest, c, is secured upon the upper side of the cylinder, and a slide distribution-valve, V, governing ports z' t" e e in the cylinder, is adapted to be reciprocated 'Renewed June 25,1884. (No model.)

upon a valve-face thereon within the chest c.' A piston, l?, formed with or secured to a pis- 'ton-rod, o', is iittcd to the bore of the cylinder C, and is reciprocated therein by steam or compressed air, which is supplied to the valvechest by a iiexible pipe provided with a valve and connected tothe pipe J, and is alternately admitted to and exhausted from opposite sides of the piston by themovements of the valve V. Two longitudinal grooves or channels, g, are formed in the piston-rod and extend throughout its length, said grooves tting accurately a series of bushings, I; k, which are secured by means of set-screws m and ribs or collars Z within along guide, G, projecting centrally from vthe front end of the cylinder C, the guide tion of the pick-holder and the piston-rod is effected by means of ribs o o on the rear end ofthe socket, which rit into the grooves g g of the piston-rod, and by a key, h2, passing through the .rod and socket. The pick-holder may be made either single or double, and may carry either one or two picks, as indicated in Fig. 2; and by the location of the picks, as described, outside of the center line of the machine the operator is enabled to better observe and direct the movements of the tool. As before stated, the front bearing-wheels, W W', are mounted concentrically, and the rear wheels, W W", eccentrica-Uy, upon their journals, in order to enable the operator, when sitting behind the apparatus, to readily direct the point of the pick either upward .or downward, or to one'side or the other, as may be required, by applying his hands to the rear wheels and turning them either backward or forward, or swinging the machine upon them. The rear wheels thus serve as the handles of the machine, und the same, being light and compact), can be operated by one man with IOOv great ease. Undercutting or bearing in7 is quickly performed by bringing` the tool close to the face of the material and directing its blows at the proper place. The length of the pick which is to be secured to the holder will vary correspondingly with the depth of the undercutting or slotting to be done.

The required reciprocating movement is imparted to the piston l? and the pick connected thereto in the following manner: Two pistons, p and p, of unequal areas, the latter being about twice that of the former, are formed upon or secured to a common stem, s, and are fitted to reciprocate in chambers or sockets in the valve-chest c. Collars i2 f on the stem s engage shoulders on the back of the Valve V,which will consequently be caused to move coinoidently with the pistons p p, thetraverse of which may be regulated, as required, by set-screws ff. In the position of the parts shown in Fig. 7 themain piston I? is on and near the commencement of its backward stroke. The preponderance of pressure upon the inside of the larger valve-operating piston p has moved the pistons p p and the connected valve V to the right, and operatingfluid is being supplied to the left side of the main piston through the port 1J, and exhausted from the right side through the ports e" and c. The piston l? will consequently continue to move backward until it reaches the extremity ofits stroke, being the position shown in Fig. l. The valve V is moved to the left, to effect the forward stroke of the piston, by means of two auxiliary valvefoperating pistons, d and a', of unequal areas, and fixed upon a common stem, a2. Ihe pistons a a work in communicating chambers or sockets ai, formed in the front head, C, of the cylinder C, and their stem a2 projects through said head into the cylinder. Portsn nlead from the chambers a3 to the valvechest, into which they open on the left side of thelargervalve-operating piston p', and a port, a', extends from the valve-chest on the righthand side of the piston p to the chambers a, in which its opening is so located that the smaller auxiliary piston a', when at the lefthand end of its stroke, will be interposed between it and the openings of the ports n. An exhaust-port, ai, leads outwardly from the chamber of the piston a at or near the righthand thereof, and a port, ai, which is designed to prevent back-pressure, leads outwardly from the left-hand end of the chamber of the piston a. A cushion-chamber, Z), is formed in the interior of the main pistonl), and is constantly in communication with the interior of the cylinder C through a port, el. A piston, b, is fitted to the cushion-chamber, its stem b'l projecting through the same toward and in line with the stem a2 ofthe pistons a a. During the forward or left-hand traverse of the main piston I the stem b2 ofthe cushion-chamber is driven outward, by the pressure acting through the port d, into the position shown in Fig. 7, and is there maintained until, by striking the stem a2, which it does before the termination of the right-l1and stroke ofthe main piston P, it moves the stem a, and is itself moved into the positions shown in Fig. l, and the parts are then in readiness for the commencement of the forward stroke. rlhe operating-Huid (steam or compressed air) will then pass from the valvechest c, through the ports n n, to the right-hand side of the larger Valveoperating piston p', and move the latteigwih the Valve V, to the left and into the positions shown in Fig. l. The main piston I? will then receive pressure from the right over its full area, and will effect a powerful stroke of the pick against the material to be acted on. During this stroke the auxiliary pistons a a are returned to the position shown in Fig. 7 by the excess of pressure upon the larger piston a, the operating-fluid is exhausted from behind the larger valve operating piston p through the ports n n, and the Valve V is thrown to the right to effect the next backward stroke of the main piston.

It will be observed that the exhaust-cavity is divided by a central partition into two compartments, each'provided with a separate dis charge, `and governed by a cock or valve by which the outlet-opening may be regulated to control the operation of the apparatus at pleas-4 ure.

I claim herein as my inventionl. In a mining-machine, the combination, substantially as set forth, of a steam or air cylinder, a piston and rod working therein, and adapted to reciprocate a pick or cutting tool, a pair of supporting-wheels mounted concentrically on the cylinder near its forward end, and a pair of supporting-wheels mounted eccentrically on said cylinder near its rear end.

2. In a mining-machine, the combination, substantially as set forth, of a steam or air cylinder, a piston and rod working therein, a pick-holder having a lateral socket secured upon the outer end of the piston-rod, and a pick or cutting-tool secured. to the outer end of the pick-holder, substantially in line with the body thereof.

3. In a miningmachine, the combination substantially as set forth, of a steam or air cylinder, a piston fitting therein, a longitudinally-grooved piston-rod fixed to said piston, a guide projecting from one end of and inclosing the piston-rod, and a series of bushings secured within said' guide and` fitting a groove or grooves in the piston-rod.

4. In a mining-machine, the combination, substantially as set forth, of a longitudinallygrooved piston-rod anda pick or tool holder, the body of which projects longitudinally from one side of a socket which surrounds the piston-rod, and is provided with ribs or projections fitting into a groove or grooves therein.

5. The combination, substantially as set forth, of a steam or air cylinder, a piston and rod working therein, a main slide distributionvalve governing the supply and exhaust of the main piston, a pair of differential valve-oper- IOO IIO

vIO

ating pistons connected to said main valve,

ton and rod working in said cushion-chamber 15 anl imparting movement in one direction to the auxiliary pistons, ports connecting the Chamber of the Valve operating pistons with the chambers of the auxiliary pistons, and an exhaust-port leading from the chamber of the 2o auxiliary pistons to the atmosphere.

In testimony whereof I have hereunto set my hand. l

` SEBASTIAN sTUTZ.

XVitnesses:

R. H. Wirifrrnnsm, J.,SN0WDI;N BELL. 

